Re: looking for ``apply'' function

[Rici Lake <lua@...>]

As long as 'a' doesn't have significant 'nil' elements, the following 
will work:

function apply(f, a) return f(unpack(a)) end

Of course, it would be easier to just use unpack() in the calling code.

If 'a' does have significant 'nil' elements, then you have to supply 
explicit limits (5.1 only):

  unpack(a, 1, 7) ==> a[1], ..., a[7]

On 17-Dec-06, at 10:45 AM, Thomas Hafner wrote:

> Hello,
>
> is there some function which behaves according to the following
> signature and semantics description?
>
> function apply(f, a) {
> -- f is a function. a is an array. Depending on the dimension of a,
> -- apply shall return
> --   f() -- for dimension == 0 (empty array) resp.
> --   f(a[1]) -- for dimension == 1 resp.
> --   f(a[1], a[2]) -- for dimension == 2 resp.
> --   f(a[1], a[2], a[3]) -- for dimension == 3 resp.
> --   ...
> }
>
> Regards
>   Thomas